[CIFS] Fix oops in cifs_create when nfsd server exports cifs mount

nfsd is passing null nameidata (probably the only one doing that)
on call to create - cifs was missing one check for this.

Note that running nfsd over a cifs mount requires specifying fsid on
the nfs exports entry and requires mounting cifs with serverino mount
option.

Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 38706e8496a3..def89f23fe55 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -264,7 +264,8 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                                 direntry->d_op = &cifs_dentry_ops;
                         d_instantiate(direntry, newinode);
                 }
-                if ((nd->flags & LOOKUP_OPEN) == FALSE) {
+                if ((nd == NULL /* nfsd case - nfs srv does not set nd */) ||
+                        ((nd->flags & LOOKUP_OPEN) == FALSE)) {
                         /* mknod case - do not leave file open */
                         CIFSSMBClose(xid, pTcon, fileHandle);
                 } else if (newinode) {